The magic-tee can be used as a power combiner or divider, depending on the needs of the application. VSWR is a measure of the efficiency of the transmission of radio frequency power from its source through a transmission line and into a load, such as from a power amplifier, through a transmission line, and to an antenna. VSWR adalah VSWR juga dapat di artikan sebagai perbandingan antara gelombang maksimum dengan gelombang minimum. This calculator computes the VSWR, reflection coefficient, return loss and matching loss in a transmission line. To use the calculator, enter the VSWR value for each of the assembly components being added. Half Power Beam Width or HPBW is an angular width (in degrees), measured on the major lobe of an antenna radiation pattern at half-power points i. A common example is a power amplifier. If you provide an email address I can share a system. 5. e. Formula is:: reflection coefficient (Γ)=. However, each field, when changed will allow. LTE is the upgrade to both GSM/UMTS networks and CDMA2000 networks. 5 1 2 r!5 x!" 5 "2 "1 ". . 0:1). 3360-x16 from Spectrum Instrumentation is a PXI Digitizer with ADC Resolution 12 Bits, Voltage Range ±200 mV to ±2. But, for a practical system, there will be a small impedance. VSWR Stands for 'Voltage Standing Wave Ratio' and is used in EMC to specify the effect of a mismatch presented to a test system signal. 780-444-6767VSWR - Return Loss - Γ Conversions These are the standard set of equations for converting between VSWR, return loss, and reflection coefficient (Γ). For a VSWR of 2, the mismatch loss is calculated to be 0. Fill in the input field and select the input type and click the "calculate" button to show the values. Reactance Calculator. It varies from 1 to (plus) infinity. This calculator is used to calculate the uncertainty of gain for any active RF device (mostly amplifier) that occurs because of the impedance mismatch. 2. This ratio represented in dB is called as Return Loss. The VSWR is a function of the magnitude of the reflection coefficient, so no phase information is obtained about the impedance. The WNC C-V2X from Wistron is a Vehicle-to-Everything (V2X) module, designed to serve automotive applications such as on-board units (OBU) and telematic control units (TCU). Skin Depth Calculator. L-3 Narda-ATM offers several calculators to assist in determining signal loss (dB) for cable assemblies, VSWR calculations, waveguide gasket types and more. 50:1, with a corresponding return loss of 3. All our transmitters above 50W feature a simple Forward and Reflected power meter on the front panel. Regard VSWR readings as a guide only particularly when trying to establish just how good your antenna is. This 50-ohm divider has AuSn bumped I/O pads for hybrid assembly and is available in a flip chip surface-mount package that measures 1. 5. —and calculates both the typical system return loss along with the worst case return loss. But, for a practical system. Calculate VSWR, Return Loss, Reflection Coefficient, Match Efficiency, and Net Transmission Loss from an RF broadcast transmitters forward and reflected power readings. Enter the desired frequency and select the wavelength. Voltage standing wave ratio (VSWR) (pronounced "vizwar" [1] [2]) is the ratio of maximum to minimum voltage on a transmission line . VSWR to Return Loss Formula VSWR = (1 + 10-RL/20)/ (1 - 10-RL/20) Example Calculation A Return. Spreadsheet and text downloads. e. The equivalent VSWR is 1. return loss Calculator (by using VSWR) Skin Depth Calculator. As an added bonus, the results are modifiable and can calculate the other values. , the signal reflected back in a transmission line. (Submissions after 2013 are here. 009. Using an SWR power forward calculator, and a EIRP power calculator I calculated the following:. 0. The effect of a short discontinuity in transmission line characteristic impedance. This can be built into a FLEXI-BOX and a transmission line PCB is. 30 MB. It can be used for a wide range of applications including existing wireless standards and 5G NR FR1 in the Sub-6GHz band, Wi-Fi 6E up to 7. The free space path loss is the loss in signal strength of a signal as it travells through free space. 05:1 it calculates a VSWR of 1. Aug 6, 2019. Multipactor is an electric field-driven event. Free Online Engineering Calculator to quickly convert a Return Loss (dB) into a VSWR. e. Our suggestion - Laminate this page and cut out the chartFrom the S-parameter matrix, you can calculate characteristics of linear networks such as gain, loss, impedance, phase group delay, and voltage standing wave ratio (VSWR). PXI Digitizer by Spectrum Instrumentation ( 68 more products) Download Datasheet Request Quote. If there is something in the microwave universe that you need a different calculator for, drop us a note and we'll see what we. Enter the two antenna heights in meters, feet, kilometers or miles and read the maximum range (r) between the. HSM12001B. Reflection Coef. Use the S11 value in the calculator above to find the equivalent VSWR. The following formula relates the return loss and VSWR. These calculators help with unit conversions, VSWR calculations, attenuator design, antenna design, radars, and various other basic calculations that are often required. Jan 23, 2021. VSWR Calculator; Wavelength and frequency calculator; Intermodulation calculators. Wireless SoC by Qualcomm ( 73 more products) Request Quote. 1, for system 2 is 0. Lower VSWR means lower reflection power (good impedance matching); thus, power transfers to load will be high. e. Advertisement. 50:1, the resulting maximum VSWR will be 4. VSWR Mismatch Errors: Both amplitude and phase errors are introduced when mismatched impedances are present at an electrical interface. $É2[ÕÜ8 âÁ. VSWR is the voltage standing wave ratio it used to measure the all-types waves (example: antenna waves) during transmission. Do all your RF calculations using this application. It consists of an SP8T switch followed by 7 fixed frequency bandpass filters which are followed by another SP8T switch. Low-pass lumped element filters. be used to add or subtract an arbitrary number of power, to convert power and voltage units from the linear to the logarithmic. requiring a termination VSWR of 1. Standing waves represent the power that is not accepted by the load and reflected back along the. Tags Communications • Communications And Networking Systems Or Equipment • Design Tools (eda) •. VSWR is defined as the ratio of the maximum to minimum voltage on a loss-less transmission line (expressed as 3. e. 2 x!5NEW Version V2323, released on 31 May 2023, FREE DOWNLOAD, WinRFCalc is the best Windows RF calculator toolbox for EMC, RF and Radio engineers. e. Sometimes something old is new, or something old is still . In one typical RF application, VSWR is used to measure the amount of reflection due to impedance mismatch. Calculator. This is the online directional coupler calculator that calculates the coupling (dB), coupling loss(dB), insertion loss (dB), and directivity (dB) of a directional coupler by entering the value of input power P1 (dBm/Watt(s)), output power. Tee Attenuator Calculator. The Smith Chart graphically maps S11=reflection coefficient= (ZL-Z0)/ (ZL+Z0) to Load Impedance (ZL), normalized to Z0 (source impedance = center of chart). Voltage Measured Along a Transmission Line. ,100 % power transferred from a source to a load via a transmission line/cable). VSWR :1 : Input Power [dBm] [W] Reflection Coefficient : Mismatch Loss [dB] Return Loss [dB] Reflected Power [dBm] [W] Output Power [dBm] [W] Share your thoughts. VSWR to Return Loss. A high VSWR (voltage standing wave ratio) is a problem in reflective type attenuators when compared to the absorptive (non-reflective) type attenuators. In industry, VSWR is sometimes pronounced "viz-wer". Unequal-split Power Divider Calculator. This calculator can be used to indicate the degree of mismatch between a transmission line and its load. The relationship between composite return loss and individual return loss in the constructive condition of identical mismatches is that the composite VSWR is the the square of the individual VSWRs. This file calculates a whole bunch of useful stuff using two-port S-parameters that you can get from manufacturers or measurements. Two years ago, one of our most respected RF experts, Lou Meyer, wrote a blog post describing the technicalities of return loss and voltage standing wave ratio (VSWR) and how the multiple components at a cell site tower make the calculations more complex. You can use a Bird 43 wattmeter to make forward and reflected power measurements and then calculate the SWR. VSWR is a function of the reflection coefficient, which describes the power reflected from the antenna. A network analyzer can be used to make S parameter measurements. The waveguide width determines the lower cutoff frequency and is equal (ideally) to ½ wavelength of the lower cutoff frequency. Spektrum is a popular spectrum analyzer program that is used with RTL-SDR dongles. Voltage standing wave ratio (VSWR) is defined as the ratio between transmitted and reflected voltage standing waves in a radio frequency (RF) electrical transmission system. RF Calculator: Wavelength, dBm, dBuV, W, dBuV/m, mW/cm^2, pJ/cm^2, V & VSWR This RF calculator has been developed by Compliance Engineering as a resource for individuals involved in EMC and RF compliance measurements. The SPECTRAN V6 VSG from Aaronia is a Real-Time Vector Signal Generator that operates from 75 MHz to 6 GHz. 83% is. How to improve VSWR – a simple technique to reduce mismatch; VSWR to Reflected Power ; Impedance Mismatch Calculator; VSWR from Forward and Reflected. You only need to type in the numbers in the Cyan boxes. Created: 16 October 2022. VSWR Calculator; Wavelength and frequency calculator; Intermodulation calculators. Enter Load and Characteristic impedances to calculate VSWR and Reflection Coeffecients. VSWR Return Loss Calculator. When an ideal match is not encountered by the incident (forward) wave, part of it is coupled to the load and part is reflected back to the source. Download this article of VSWR Explained. For five t-line sections each having a VSWR of 1. 98dB OR a Mismatch Loss of only. Return Loss and Mismatch Loss Calculator. Marki Microwave's Tools is a collection of free online applications for RF analysis and synthesis that are easy to use and mobile-friendly. Just in case you don’t care for mathematical equations, here’s a little “cheat sheet” table to help. Easy to use tool, Kintronic Labs, online VSWR Calculator. Suitable for VHF (~1. Line Type: Belden 8215 (RG-6A) Belden 8237 (RG-8) Belden 9913 (RG-8) Belden 9258 (RG-8X) Belden 8213 (RG-11) Belden 8261 (RG-11A) Belden 8240 (RG-58) Belden. , there is no standing wave). The VSWR of an AIS transponder, is a measure of the level of standing waves present in the antenna cable (feeder). In particular since antenna impedance depends on the dimensions of its conductors which are themselves measured in wavelengths of the operating frequency, there will. Convert Vpk-Vrms-dBV-dBu-mW-dBm. The first reflection back from each system will be the largest and subsequent reflections will be heavily attenuated, so we. Related Blog Posts and Calculators. 4 and 2. 6 dB of mismatch loss). You can use our VSWR calculator to see that 1. The table was created with a handy Windows-based program called VSWR Calculator, detailed by author Steve Hageman of Agilent Technologies (Santa Rosa, CA) in his. RF Calculators. The DC block can be thought of as a high-pass filter allowing. VSWR Calculator. Unless you have a piece of slotted line-test equipment this is a hard definition to use, especially since the concept of voltage. Return Loss is a measure of the amount of energy that is reflected back at a discontinuity in a Radio Frequency Circuit . The results of this calculator may be rounded, the user takes responsibility for use of results. A table of convenient values are presented at the bottom. This morning, I got the following e-mail from a friend of mine who is a member of the University of Michigan Amateur Radio Club. Round Wire ac ResistanceNEW Version V2323, released on 31 May 2023, FREE DOWNLOAD, WinRFCalc is the best Windows RF calculator toolbox for EMC, RF and Radio engineers. Balanced Attenuator Calculator. Now let's look at the response. S 11 =S 22 =S 33 =S 44. At 1000 MHz, the S11 (dB) = -RL (dB) = -15 dB. But the meter at the transmitter will show a VSWR of 1. 50:1, the resulting maximum VSWR will be 4. Plot input impedance for a range of frequencies. Pout is the output power or signal level. Power: VSWR=1. The power being reflected back is only a very small amount is not anything to worry about. reflection coefficient definition. Transmitter and receiver antenna gains, transmit frequency and power are provided as inputs. Home. This online reflection coefficient to VSWR calculator calculates the VSWR by entering the reflection efficient Γ (= value between 0 & 1). 98 dB return loss. The online calculators are usable in pop-up mode for easy. For one example, if you have two 2:1 mismatches separated by some distance, the worst case at some frequencies will look like 4:1 VSWR. Schematic representation of a PCB patch antenna: The calculator is based on simplified formulas for calculating microstrip. It is the output power when a signal is concentrated into a smaller area by the Antenna. 5:1 is ideal, a VSWR of 2:1 is considered to be marginally acceptable in low power applications where power loss is more critical, although a VSWR as high as 6:1 may still be usable with the right equipment. Load in ohms. 4. Noise Factor to Noise Figure Calculator. ) and complex I/Q signals up to 4096QAM. VSWR Calculation. 93 dB. High VSWR values indicate less efficient power transmission and can lead to significant. R. Conclusion : In summary, RL and VSWR formulas and calculators are valuable tools that enhance the efficiency. As an added bonus, the results are modifiable and can calculate the other values. In order to improve the. The Unknown Editor has been spouting off about a variety of topics since he started this site back in 2001. Description. The M5i. Note that the outer boundary of the Smith Chart (where =1) corresponds to a VSWR of infinity. VSWR Conversion Table. , convert to noise factor F1, F2, &F3). Calculate initial load line of valve RF amplifier. This general RF calculator includes calculations of path loss, VSWR and wavelength as well as. The WTG scale is labeled in terms of the transmission-line length in wavelengths (not electrical degrees). Calculate VSWR, Return Loss, Reflection Coefficient, Match Efficiency, and Net Transmission Loss from an RF broadcast transmitters forward and reflected power readings. If the antenna reflects 250 watts the VSWR at the antenna will be 1. 43. As a result, this limits the phase of the total OQPSK signal to no. Example Problem Find the SWR of the transmission line or wave guide whose load or. Converts VSWR into dBm. Frequency in Ghz. Antenna and cable analyzers are handheld RF test instruments used for on-the-go testing of RF cables and antenna performance at their frequency of operation and quickly locate faults in RF cable, connector, and antenna. 94 -> 100W output = 80W radiated VSWR ReturnLoss(db). There is a mathematical equation to accurately calculate the VSWR of an RF system. VSWR = (1 + √ PRFL/PFWD ) / (1 - √ PRFL/PFWD ) back. The length of a half-wavelength dipole can be calculated by the given formula: L =. On-Demand Webinars. In this highly technical and exacting field, having precise tools like a VSWR/return loss calculator at one's disposal is a necessity. Application Note File. For a VSWR of around 5. VSWR to Return loss calculator. VSWR to return loss conversion “ Convert VSWR ” This is an online conversion tool for converting between VSWR, return loss and reflection coefficient, which are different ways to express how well a load is matched to a source. 2 at 2380 MHz, the mismatch loss is calculated to be 0. Pasternack's RF Calculators and Conversions section provides engineers valuable and easy-to-use tools ranging from complex mathematical formulas to simple conversions. 57. 2:1,. Waveguide Calculators. Free online calculators. Here is a useful "cheat sheet" converting VSWR to the percentage of reflected power. Pincident watts. In complex notation it is: Z[Ω] = R + Xj. This module delivers a 5G downlink data rate of up to 2. The EIRP can take into account the losses in transmission line. Enter the return loss, VSWR or reflection coefficient using drop-down menu to calculate how much power is reflected from or delivered to the load and mismatch loss. 43 20. 50:1, the resulting maximum VSWR will be 4. This can be built into a FLEXI-BOX and a transmission line (50 Ohm track) PCB is available which easily adapts for this circuit with one simple trimming. The input to the antenna will be 8,511 watts. The length of the dipole is usually one-half of the wavelength of the RF signals. VSWR is defined as the ratio of the maximum to minimum voltage on a loss-less transmission line (expressed as 3. com . Resonant Frequency Calculator. return loss Calculator. A more realistic match for a cable & antenna system is. This module has an integrated 16-element dual-polarized antenna array and an internal CPU with beam control and automatic. 0:1, 2. Please enter the value. S22 would be the reflected power radio 2 is attempting to deliver to antenna 2. Data throughput; Noise Temperature; RX sensitivity;Internally, this calculator first converts the given noise figure (in dB) inputs to normal values (i. Requires Windows 7 (64 Bit) or higher. High return loss means low reflected power, so high return loss is good for a system. Unit Converters. VSWR Calculator. From reaching the most routine arithmetic, percent, or decimal values to metric conversions and statistical. The online calculators are usable in pop-up mode for easy desktop. vary with frequency). It has a real-time bandwidth of 120/240 MHz and can generate standard signal types (CW, sweep, chirp, pulse, etc. VSWR. These multiple solutions are possible because each contributor is a vector having both. SPD701. Enter Load and Characteristic impedances to calculate VSWR and Reflection Coeffecients. After a click on 'Calculate' the components required for the filter response are calculated. For a VSWR of 1. Thus, prime center also represents the 1. If the match is not perfect, the peaks and valleys of the returned signal will not align perfectly with the transmitted signal and the greater this number is, the worse the match is. The relation between return loss, VSWR, and the reflection coefficient provides a comprehensive view of the system's efficiency. Measure S11 across the desired frequency range. It also gives an estimate of the mismatched loss if the mismatch is specified. The C-V2X module operates in the 5. 4 GHz. Gain from Antenna Factor (50 Ω system) Radiated Power Conversions. The IEEE definition for effective radiated power (ERP), which is. This website was last updated. The GH-60 from Sanko Technologies is a Signal Generator with Frequency 10 MHz to 6 GHz, Output Power -110 to 14 dBm, IP3 15 dBm, Harmonics -30 dBc, Non Harmonics -50 dBc. dBm stands for decibel-milliwatts; is a dimensionless unit used to define/measure signal strength (power level), with reference to 1 milliwatt. xml ¢ ( ÌXMsÚ0 ½w¦ÿÁãkÇ ¤mšf€ ’öØf&é Pä «È’FRøø÷] Èdˆ ai _ÀXÞ}ï-Úõ nV•H `,Wrœ óAš€dªàr6NÿþÌ®ÒÄ:* *”„qº ›ÞL>~ =®5Ø £¥ §¥súš ËJ¨¨Í• ‰+Se*ê𧙠Mٜ΀ —„)é@ºÌÕ9ÒÉè ¦ôY¸äÇ oo˜ & VºJ(ñÒ ¥, ¬ºm· ø‘¹%ô“*Œx>÷]:‰Ý,¤ ÛB ÕO þ*ÝÓB· . RG-8 and RG-213 (50 ohm); and RG-11 (75 ohm) are about 0. All channels of this splitter are phase and group delay matched and each channel includes a ferrite isolator. Upper VSWR: Calculate. Welcome to our VSWR (Voltage Standing Wave Ratio) calculator, a tool designed to simplify your RF projects by accurately determining the VSWR based on your system’s. After using our pi pad calculator and installing your attenuator, you can use our VSWR calculator to know how your VSWR has improved. It provides a measure of how efficiently RF power is transmitted from a power source, through a transmission line, to a load such as an antenna. . In this situation (refer to the equations above), Γ = 1 and VSWR = 2/0 = ∞. Here is a useful "cheat sheet" converting VSWR to the percentage of reflected power. A set of 4 calculators with Butterworth response filters for analog low-pass, high-pass, band-stop and band-pass. The VSWR/return loss calculator from Pasternack will find VSWR, return Loss, mismatch loss, and the reflection coefficient given any one of the listed input types. 5 GHz Ku Band, Frequency TX 10. Hence, usually, the designers prefer a non-reflective type attenuator. 14. , the signal reflected back in a transmission line. Enter VSWR (a value greater than or equal to 1) S11 to VSWR Formula S11 = (VSWR-1)/ (VSWR+1) S11 (dB) = 20*Log10 (S11) The input reflection coefficient, S11 < 1 Example Calculation For a VSWR of 1. A magic-tee, or hybrid tee, is a 4-port waveguide structure that behaves as an electric field and magnetic field 3dB coupler, and is in fact, a combination of E-plane and H-plane tees. 64 (800) TMS-COAX • TIMES MICROWAVE SYSTEMS TC-400-TM LMR®-400-UF UltraFlex Communications Coax LMR-400-UF TC-400-716-MC Connectors Inner Outer Finish* Part Stock VSWR**. In addition, if GAMMA, VSWR, or dB is known, the calculator can convert between the three. Suitable for VHF (~1. Forward Power (W) Reverse Power (W) VSWR. With a low mismatch of 2:1 VSWR and 100 Watt of forward power, only 4 Watts are reflected. Skin depth calculator Stripline Impedance calculator Smith charts VSWR/Return loss converter Wavelength calculator Wilkinson splitter designer. Completely flat VSWR when measured at the station patch panel could for example indicate that the system may have hidden losses, be warned! Consider that a VSWR of 1. Reflection Coefficient. It varies from 1 to (plus) infinity and is always positive. of the filter. Rectangular Waveguide Sizes. This tutorial defines VSWR and explains how it is calculated. 5dB loss per 100 feet at 146 MHz). VSWR is most often described as a function of the reflection coefficient at the input of a signal chain element. To help the engineers conducting VSWR sweeps, Lou developed the PIM and VSWR System Calculators, one of our most valuable assets helping many customers during the design phases and site build-outs. Mismatch Loss (dB) 3. This mismatch can influence the performance of the source. Finally, calculate the Standing Wave Ratio. Power to Voltage. Click on Calculate and the optimum length. Edit: if you want to learn the math the Excel sheet has everything laid out so. An 805C cost $525 in 1966. Free online calculators. Return loss, also known as reflection loss, is a measure of the fraction of power that is not delivered by a source to a load. 4 Butterworth types for analog filter design. 0:1). e. The entry unit of frequency can be modified, the output wavelength is calculated in meters. The dBm is a convenient unit; used in radio, microwave, audio applications, and fiber-optical communications networks to measure signal strength. This VSWR calculator will calculate return loss, mismatch loss, loss in percentage and the reflection coefficient. Where: Gain (dB) = pyramidal horn antenna gain in dB (i. Modelling practical transmission lines. - Tee Attenuator Calculator. The VSWR Calculator uses the Root-Sum-of-Squares (RSS) Analysis to calculate the most probable VSWR values in a single waveguide assembly with multiple bends, twists, or a. The method generally makes sense in that the return loss, or VSWR, performance of each element in a transmission system additively degrades the system return loss. The link budget is an impotant value that enables engineers to design systems based on the required sensitivity of a receiver at a particular distance. 0. Stripline Calculator. Circles centered at the origin of the Smith Chart are. Aug 22, 2021. 89% of the power is transmitted forward, while 11% is reflected back into the source. The VSWR value range from 1. Click to use the Normalized VSWR calculator, Impedance Z= R + j X. We can calculate it as, based on load impedance Z L and conduction line impedance Z 0: Γ = Z L − Z 0 Z L + Z 0. 39 0. This antenna wavelength calculator can be used to determine the physical length of an antenna’s electromagnetic wave in free space. Voltage standing wave ratio (VSWR) (pronounced "vizwar" [1] [2]) is the ratio of maximum to minimum voltage on a transmission line . to a calculator or computer program that will handle it. A = Area of aperture in m 2. 3360-x16 can be seen below. Even so, the math gets tedious in a hurry. Enter Reflected Power: watts. e. In summary, the VSWR Calculator is an essential tool for RF professionals, enabling them to assess the quality of signal transmission and diagnose issues. Wavelength Calculator. 50:1, with a corresponding return loss of 3. λ = The wavelength of the Antenna in meters. Here’s a really simple way of double checking how to much to trim your antenna elements. This application note supplies a free of charge software tool that can be used to add or subtract an arbitrary number of powers. If the minimum value of voltage (Vmin) shifts to the left of that recorded in the loaded condition. Bottom line is that in most cases, if the return loss of a coupler is specified at 15 dB, all of the ports are expected to meet that requirement, over the. This calculator is designed to give the vertical length (height) of a particular antenna, for the frequency and wavelength chosen. On the other hand, VSWR and the reflection coefficient are connected by the equation: VSWR = (1+|Γ. Mismatch Loss (dB). Just enter the value of source return loss, input return loss, output return loss, load return loss, device gain, and isolation then the calculator will compute the minimum and maximum gain. Match different impedances by attenuation. The antenna accepts a certain amount of energy delivered to it by the transmission line (characterized by S11, VSWR, or return loss), and Antenna Efficiency characterizes the amount of energy lost ‘in’ the antenna after this. 43. VSWR / Return Loss Calculator. 0 indicates about 75% of the power is delivered to the antenna (1. Return loss can be. The VSWR Calc program is a Microsoft Visual Basic 32-bit application that runs on Windows 95, 98, and NT 4. After inserting the variables and calculating the result, check your answer with the calculator above. Reflected power ratio for system 1 is 0. Use Forward and Reflected Power to VSWR Calculator to find the value of the effective VSWR for any RF transmission line, using the forward and reflected power. מדריך שלם ל- VSWR מ-FMUSER [עודכן 2022] בתורת האנטנות, VSWR מקוצר מיחס גל עומד מתח. VSWR calculator: Isolation between circuit stages (mentioned above) is a way to minimize the voltage standing wave ratio (VSWR) and, in this way, improve impedance matching. 9, half the power is reflected back. Figure 1 Given the source and load VSWRs, the VSWR Calc program quickly calculates RF measurement uncertainties. Please enter your values below. He got a request from a researcher at the university, who. A table of convenient values are presented at the bottom. The power in decibel-milliwatts ( P(dBm)) is equal to 10 times base 10 logarithm of the power in milliwatts ( P(mW) ):Use the Series and Shunt Impedance Calculator: to try your own impedances; Change Grid: S11, (ZL normalized to source impedance Z0) Z_Load: Z_Load:. Wavelength Calculator. Plot input impedance for a range of frequencies. 97dB. With this calculator tool you can calculate the resonance frequency of a a cavity ( rectangular or cylindrical ) and a structure on a PCB. You can use it for free. Enter Forward Power: watts. VSWR (pronounced "viswar"), or the Voltage Standing Wave Ratio, is the ratio of the maximum standing wave amplitude at one node to the minimum amplitude at another node in a system. 0 SWR circle (with a radius of zero). The S-2-TCPUSEW-H-NI6 from CommScope is a Multiband 2-way Power Splitter that operates from 340 to 3800 MHz. The following formula is used to calculate the Return Loss (RL) from Voltage Standing Wave Ratio (VSWR). the load end VSWR - bad case Zload (Zload=Ro/VSWR). e. VSWR.